:root {
  --text: #1a1a1a;
  --muted: #6b7280;
  --bg: #fafafa;
  --card: #ffffff;
  --line: #e5e5e5;
  --line-strong: #1a1a1a;
  --primary: #1a1a1a;
  --primary-hover: #404040;
  --accent: #2563eb;
  --danger: #dc2626;
  --success: #16a34a;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.5rem;
  --space-2xl: 4rem;
  --radius: 3px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

h1, h2, h3, h4 {
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.container {
  width: min(960px, calc(100% - 3rem));
  margin: 0 auto;
}

.site-main {
  min-height: 100vh;
}

/* --- Auth / Login --- */

.auth {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: var(--space-xl) 0;
  background: var(--bg);
}

.auth-card {
  width: min(400px, 100%);
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-xl);
}

.auth-title {
  margin: 0 0 var(--space-xs) 0;
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.auth-description {
  margin: 0 0 var(--space-xl) 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.auth-form {
  display: grid;
  gap: var(--space-lg);
}

.auth-label {
  display: grid;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.auth-input {
  padding: 0.75rem 0;
  border: none;
  border-bottom: 2px solid var(--line);
  border-radius: 0;
  font: inherit;
  font-size: 1.05rem;
  background: transparent;
  transition: border-color 0.15s;
}

.auth-input:focus {
  outline: none;
  border-bottom-color: var(--text);
}

.auth-button {
  margin-top: var(--space-sm);
  border: 2px solid var(--text);
  border-radius: var(--radius);
  padding: 0.8rem 1.25rem;
  background: var(--text);
  color: #fff;
  font: inherit;
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.auth-button:hover {
  background: transparent;
  color: var(--text);
}

.auth-error {
  margin: 0 0 var(--space-md) 0;
  color: var(--danger);
  font-weight: 600;
  font-size: 0.9rem;
}